Network in numbers
The transmission network that we own and maintain has been carrying electricity around England and Wales to where it’s needed for over half a century.
From the number of field staff who work on the grid to the volume of renewable energy we connect, the facts and figures behind our network tell the story of how we’re helping to power the country to net zero.
The reliability rate of our electricity transmission network
Field staff working all year round to build and maintain our network
Planned investment in our network in the five years to 2026
Steel pylons across the country carrying our high voltage lines
99.999%
900
£9bn
21,900
Miles of overhead lines (enough to stretch from London to Miami)
The voltage of electricity carried on most of our overhead lines
Total generation connected to our transmission network
Countries connected to our network via six interconnectors
4,500
400kV
64GW
Five
Our people
We’re leading the transformation towards a greener future, to bring more affordable energy to everyone.
This is a powerful goal – and we’re all empowered to achieve it at National Grid. We’re dreamers, big thinkers, innovators and builders super-powering the future of energy.